A safety investigation has identified that when a pilot operating a fixed-wing aircraft, in the
agricultural role, releases the power lever on take-off to place their hand on the ‘dump’ lever,
there is a potential safety risk of the power lever migrating back uncommanded.
This movement of the power lever could cause the engine to develop less power, leading to an
undesired power loss at a critical phase of flight.
I would have thought that the "powerlever migrating back" would do what it is intended to do, reduce engine power.